gbanyan ed492c1874 Add guided tour feature with Driver.js ...

- Install driver.js package for lightweight product tours
- Create GuidedTour component with bilingual tour steps (Chinese/English)
- Create TourPromptModal to ask users if they want a tour after welcome
- Add data-tour attributes to Toolbar, FilePanel, PedigreeCanvas, PropertyPanel
- Tour covers: file operations, adding persons, canvas usage, relationships,
  editing properties, and exporting

Tour flow:
1. First visit: Welcome Modal → Tour Prompt Modal → Start tour or skip
2. Subsequent visits: No modals shown

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-22 21:33:26 +08:00

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